Abstract

The perovskite multiferroic bismuth ferrite (BiFeO3) particles were synthesized by hydrothermal method under external magnetic fields with respective intensities of 0 T, 4 T, 8 T, and 12 T. High magnetic field greatly affected the growth behavior and magnetic property of BiFeO3. The morphology of BiFeO3 changed from regular cube to irregular sphere, and finally became a chain-like structure. Meanwhile, the magnetization of the as-prepared BiFeO3 particles measured under a 1.8 T magnetic field was enhanced from 0.1003 emu/g (0 T) to 0.2067 emu/g (12 T). The possible mechanisms of crystal growth and magnetic property were also discussed.

Received 13 January 2012Accepted 04 February 2013Published online 25 February 2013

Acknowledgments:

The authors would like to thank the National foundation of Science (Nos. 50872142/E0207, 50902140, 51171106, and 2011CB610404) and the Shanghai “Phosphor” Science Foundation of China (No. 10QA1402500) and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning for financial support.

[Magnets or magnetic bodies characterised by the
magnetic materials therefor; Selection of materials for their magnetic
properties, Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties]